Abstract
We determine the magnetic dipole and the electric quadrupole b moments of the Th nucleus by combining our high-precision calculations of the hyperfine constants with measurements reported in Campbell et al. [Phys. Rev. Lett. 106, 223001 (2011)]. We find that the previous value [Gerstenkorn et al., J. Phys. (Paris) 35, 483 (1974)] is incorrect by 25%. We report a method for determining the accuracy of theoretical hyperfine constants and demonstrate that it can be used to extract the electric quadrupole moment with a 1%–2% uncertainty for a large number of nuclei. This approach allowed us to identify 40% inconsistencies in measurements of Ra hyperfine constants .
- Received 3 May 2013
DOI:https://doi.org/10.1103/PhysRevA.88.060501
©2013 American Physical Society